radio.garden volume not showing volume control in browser on microsoft surface - firefox

I don't know anywhere else to ask this. radio.garden is an aggregator of online streaming radio stations. In windows 10 on various machines, it shows a volume slider beside the play/pause controls. With the same version of firefox on windows 10, and still after upgrading to windows 11, the volume control doesn't show on microsoft surface. I have deleted display and audio drivers and let them update, and I have turned firefox hardware acceleration settings off (even though the settings indicates that it is only for graphics). I have also verified that microsoft edge also does not display the volume control.
What do I need to check next to figure out what's going on? I assume the browsers are using some api that perhaps I have blocked via privacy settings that aren't applicable on desktop or something, or maybe provided by some audio drivers and not others?

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Share screen of Microsoft Windows 10 apps using webrtc

When a Windows 10 computer wants to share some of its screens using webrtc protocol (firefox navigator), a list of the windows that can be shared appears. In this list, only "normal" applications appears, not the one related to "apps". By example, spotify window appears, but OneNote window is not listed.
It seems (?) webrtc screen share is not compatible with UWP apps.
Knows someone a way to share the screen of an app via webrtc ?
Note: following link allows to reproduce this issue:
https://mozilla.github.io/webrtc-landing/gum_test.html
you do not need share anything, just push "window" and see the list of windows that appears.
I believe Chromium (the open source version - not sure about Chrome) faces the same problem as UWP requires to use a new Win 10 API which shows it's own window selector. And then obviously that selector doesn't work on other problems. So it's a common problem on Win 10, with no known good solution as far as I can tell.

Prevent disconnected display from merging windows into the active one

I've got a personal laptop (running Windows 10) which I use at work where I connect it to an external display using extended display mode. I keep all my personal icons and windows on my laptop display and store all the work-related windows on the external display. Whenever I unplug it, all the windows and icons from that display are merged into my laptop screen. I want to programmatically prevent changing anything on my primary screen when the secondary is disconnected. I'm currently writing a utility app for a variety of small productivity improving features and would like to add such feature in it. I can think of two ways to achieve this:
by tricking the system to think that the external display hasn't been
disconnected;
or take all the opened windows and icons on disconnected screen and put them on separate virtual desktop.
I was looking into Windows GDI Device Context Functions but haven't found anything about display connection/disconnection events. How can I detect display disconnection (and get that display's opened windows and icons)? Anything that can be done using C#, C++ or PowerShell scripts would be much appreciated!

Locking the user screen in Windows store apps for Windows Surface

I am developing an application for Windows Surface RT.I have an requirement to lock the device screen
programmatically(thru c#). I searched MSDN and various form but in vain. Please help me to figure out this requirement.
You can't force the screen to be "locked" from a Windows Store application. It's just not an available API.

WP7 XNA without DX10

XNA game fails to deploy on the WP7 emulator, I suppose, it's because I have Intel GMA950 video adapter without DX10 support (it says that I have incompatible monitor adapter). Is it possible to use emulator & xna without changing PC configuration?
Check your Project properties and see if you have the Reach profile selected or HiDef. If you have HiDef, change it to Reach. I have a laptop with an Intel G945 video adapter and HiDef doesnt work, but Reach does.
EDIT
I have just seen your edit and unfortunately you won't be able to do anything unless you change the the graphics device.

How to set webcam parameters programatically on Microsoft Lifecam Cinema (e.g. switch off autofocus)

The Microsoft Lifecam Cinema software has several options to control focusing, exposure and so on. I need to control these programatically for a machine vision project. How can this be achieved?
MATLAB toolbox for image acquisition allow access to the full functionality of the LifeCam. E.g. focus. However the provided driver has a problem, which Microsoft refuses to deal professional with - they claim that it is MATLAB that has a problem. So at the moment I cannot control brightness and exposure, two parameters that should be accessible.
I ran into this same problem on a photo booth kiosk I built. To get around it, I created a simple command line utility to set these preferences and allow for reapplying them at startup.
You can find more details on downloading and using it in this Microsoft Answers question:
http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/is-it-possible-to-save-auto-focus-auto-color/e6b812e3-5e52-e011-8dfc-68b599b31bf5

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